Regenerative pasteurizing system.



PATENTED JAN. 8, 1907.

APPLICATION FILED SEPT. 27, 1906.

2 $HEETS-SHEET 1.

No. 840,961. PATENTED JAN. 8, 1907. G. W. REID. REGENERATIVE PASTEURIZING SYSTEM.

APPLIGATION FILED SEPT. 27, 1906.

2 SHEETS-SHEET 2.

. moewfoz nately at opposite ends and the several coils To all whom it may concern.- V Be it known that I, CHARLES W. REID, of

Milford, county of Kent, and State of Dela- 1 with the lower cooling-coil an additional cooling-coil, with the result that the cooling of the pasteurized milk will be gradual and not IT-ED STATES, PATENT OFFICE.

' CHARLES W.-REID, OF MIILFORDI, DELAWARE.

REGENERATIVE PASTEURIZING SYSTEM.

ware, have invented, a new and useful Improvement 1n Regenerative Pasteurizing Systems, of which t efollowing is a specification.

This invention relates to the pasteurization of milk on the reggnerative system, in

:or raw milk is cirwhich the incoming co culatedim roximity to the outgoin hot or pasteurize m1lk, w1th the result t at the temperatures of the two currents tend by their reciprocal action to equalize, the cold milk being raised in-temperature and the hot milk reduced in temperature.

* The invention consists in an improved apparatus of simple construction for effecting the pasteurization and cooling of the pasteurized milk in an economical and expeditious manner.

' In its general features the apparatus comprises three series or coils of superposed horizontally-arranged tubes, the tubes of each 0011 commumcatmg with each other alterbeingnon-communicating and arranged in a vertical plane one above the other, so as to form a continuous. surface over whichthe milk flowing in a stream is first subjected to a pasteurlzlng action and then to a cooling action. The upper coils, through which the heating medium is circulated, constitutes the pasteurizer and eifect the pasteurization of Q surface. The intermediate coil, through the milk flowing downward over its external which the incomin cold or raw milk is ona collectin the cooling which the milk from the exterior. of the intermediate'coil'flows, constitutes a cooler to further reduce the telmperature of the down- -flowing pasteurizedk culated and over'w 'ch the pasteurized milk flows fromthe upper c011, serves as 'a means of equalizing the temperatures. of the two streams,;reducing that of the downflowing stream and raising that of the inner upflowing stream. The lower-coil, through-which medium is circulated and over between .the lower, .endof the pasteurizmgasteunze coil 'so'that any ,variation in the temperature I Specification of Letters Patent. Application filed September 27, 1906. Serial No. 386.405.

also in interposing- Patented Jan -8, 1907.

will be equalized and it will flow onto the intermedlate coil at a uniform temperature.

The invention consists also in combining too sudden.

The invention consists also in the details of construction and combination of parts hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a sideelevation of m improved apparatus, partly in section. ig. 2 is an end elevationof the same, partly 1n section. Fig. 3

each coil communicate with each other alternately at opposite ends by means of manifolds 6 and 7, closed by cap-plates 7 so that a continuous course or channel is formed back and forth from one end of the coil to the other. communicating as far as any internal connection is concerned. They are arranged one above the other in a vertical plane, the upper end of each coil forming a continuation of the lower end of that next above, so that the.

several coils present an upright continuous The several coils are, however, nonfiat body made up of the horizontally-arran ed tubes.

T e upper coil which I designate the pasteurizing-coil, as its lowermost tube extended to the outside, as at 8, at which point a heating medium is introduced into the coil from any suitable source and circulating therethrough it leaves the same through the upper tube, which is similarly extended to the- 7 outside, as at 9. The heating medium may be hot water, and it may be caused to circulate through the coil by gravity or pressure, its function beingto so heat the 001i that as the milk flows thereover', as will be presently described, it will be raised in temperature to the 1pasteurizin -point. I

v T e interme ate coil 2, which I designate the"-regenerativecoil, has its lowermost tube extended to ,the outsidedas at 10, into 11 which the cold raw milk is introduced from- .therefrom flows downward by gravity over the external surface of the pasteurizmg-coil and by it is raised in temperature from about 140 Fahrenheit, its temperature in the trough, to about 160 Fahrenheit.

The raw milk enters the re enerative coil at tube 10 at about 60 Fahren eit, and in its passage through this coil it is raised to-about 140 Fahrenheit b the hot stream of pasteurized milk whic flows over the external surface of the regenerative coil after it leaves the external surface of the pasteurizing-coil,

so that by a reciprocal, action of the two streams of milk, the one fiowin cold through the coil and the other flowing ot on the external surface of the coil, the temperature ofthe internal stream is raised and that ofthe external stream is reduced, the latter being reduced from about 160 Fahrenheit to about 80 Fahrenheit by the time it reaches the lower end of the regenerative 'coil.

The lower' coil 3, which I designate the cooling-coil, has its lower tube extended to the outside, as at 14, into. which the cooling medium is introduced and circulating through the coil leaves the same by the upper tube extended outward, as at 15. The, cooling medium circulated through this coil may be of such temperature and the number of tubes in the coil may be such that the downfiowing external stream of milk will be reduced from about 80 Fahrenheit, its temperature at the point where it flows onto the coil, to about .one.

j sired.

in temperature may not be too sudden, I

45 Fahrenheit, the final temperature de- In order, however, that the reduction propose to circulate through coil 3 Water at a moderate temperature, such as sprin -water,

so as to bring the temperature of t e milk down to about Fahrenheit, and I pro vide for the purpose of further and finally reduring the temperature an additional coolingcoil 3, arranged vertically below the first I circulate therethrough ice water or brine fromany suitable source, introducing the same by the lower tube 16 and carrying it off by the upper tube 17, both of which tubes are extended outward for the proper connections to be made. The downwardlyfiowing milk passing onto this final coil at about 70 Fahrenheit leaves the same at about 45 Fahrenheit and is collected in a trough 18, from which it is discharged into a receiver 19.

It will be observed from the construction described that the raw cold milk after being raised by the regenerative action of the intermediate coil to about 140 Fahrenheit pursues a downward continuous course over the external surface of the several coils, being in 3- its passage first efiectually pasteurized and then gradually cooled to the proper degree for use.

' i In order that the milk flowing from the pasteurizin -coil may pass onto the regenerative coi at a uniform temperature throughout and not be of different temperatures at diflerent points, which might result from an uneven flow of the milk over the coil, I interpose between the pasteuriZing-coil and the regenerative coil an equalizing trough or basin 30, sustained between the columns 4 and 5 in positionto receive the pasteurized milk from the upper coil and provided with openings in its bottom, throughwhich the milk is disohar ed ontothe lower coil. The

pasteurized mil collecting in this trough and 4 mingling causes any variation in temperature to be equalized. I do not deem this equalizing-trough essential to the operation of the apparatus, although itis preferable to employ' it. curedby dispensing with 'it and arranging the lower end of the ,pasteurizing-coil and the upper end of the regenerative coil in proximity.

In order that access may be had to the in- Satisfactory results could be seterior of the'tubes of the regenerative coil for cleansing purposes, this being very desirable by reason of the fact that the milk is circulated through this coil, I propose to pro- 7 vide for removing at will the portions of the .end cap-plates which cover the manifolds at this point. This construction is illustrated in Figs. 1 and 3, where it will be seen that the cap-plates at each end of the apparatus are provided each with a removable section 19, fitting tightly against the outer ends of the manifold-partitions 20 between the tubes, and are held in place by clampmgand provided with a clamping-screw 23, adapted to bear against the outer side of the movable section and hold the same firmly in place,th.ereby forming a continuation of IID ,arms 21,pivoted, as at 22, to the side of the vertical columns 4 and 5 to swing outward,

the remaining fixed portions of the capplates.

A packing 25, of rubber, is introduced between the movable sections and the ends of the manifold-partitions to form a tight oint. To remove the sections, the clamping-screws are loosened and the clamping-arms thrown outward. The sections being now lifted off, the ,open ends of'the tubes are fully exposed, so that a swab or other cleansing in strument may be freely introduced or other means may be employed to effectually cleanse the interior of the tubes.

I do not claim herein the combination IflO with a series of horizontal superposed tubes of means for circulating raw milk through the tubes, means for pasteurizing the raw milk, and means for discharging the same onto the top of said series of tubes.

Having described my invention, what I claim is 1. In a regenerative pasteurizing system, the combination of a pa steurizing-coil comprising a series of horizontallyarranged superposed tubes, means for circulating a heating medium therethrough, a regenerative coil arranged vertically below the pasteurizing-coil and comprising a series of hori. zo-ntally-superposed tubes, means for circulating the raw milk through the tubes of the regenerative coil, and means for flowing the 7 milk from the regenerative coil downward over the external surfaces of the two coils in succession.

2. In a regenerative pasteurizing system, the combination of a pasteurizing-coil, a regenerative coil, and a cooling-coil, said coils being each composed of a series of horizontally-superposed tubes communicating with each other, the several coils being non-communicating and arranged one vertically above the other in a single vertical plane, the pasteurizing-coil at the top, the regenerative coil next, and the cooling-coil at the bottom, means for circulating a heating medium through the pasteurizing-coil, means for circulating the raw milk through the regenerative coil, means for circulating a cooling me-' dium through the cooling-coil, and means for directing the milk from the regenerative coil onto the top of the pasteurizing-coil; whereby in flowing over the several coils, the milk will be successively pasteurized and cooled.

3. In a regenerative pasteurizing system, the combination with means for pasteurizing the raw milk, of means for circulating the pasteurized milk in proximity to but separated from the raw milk; whereby the ternperature of the raw milk will be raised and that of the pasteurized milk correspondingly reduced, a primary cooling-coil comprising a seriesv of horizontally-arranged superposed communicating tubes, a secondary non-communicating cooling-coil arranged vertically beneath the first and comprising a series of horizontal superposed tubes communicating with each other, means for circulating a cooling medium of a moderate temperature through the primary cooling-coil, means for independently circulating a cooling medium of a considerably lower temperature through the secondary cooling-coil, and means for discharging the pasteurized milk onto the the combination of a pasteurizing-coil comprising a series of horizontal superposed tubes communicatingwith each other, a noncommunicating regenerative coil comprising a series of horizontal superposed tubes communicating with each other and arranged vertically beneath the pasteurizing-coil, means for circulating a heating medium through the pasteurizlng-coil, means for circulating raw milk through the regenerative coil, means for directing the milk from the regenerative coil'onto the top of the pasteurizing-coil, that it may flow down its external surface, and a receiving-trough interposed between the two coils in position to receive the milk from the pasteurizing-coil and direct it onto the regenerative coil.

5. In a regenerative pasteurizing system, the combination of an upper pasteurizing-coil comprising a series of horizontal superposed tubes communicating at their ends through manifolds, a regenerative coil arranged vertically beneath the pasteurizing-coil and comprising a series of open-ended horizontal superposed tubes communicating at their ends through manifolds, a cooler-coil arranged vertically beneath the regenerative coil and comprising a series of horizontal superposed tubes communicating at their ends through manifolds, fixed cap-pl ates closing the manifolds of the pasteurizing and cooling coils, removable cap-plates closing the manifolds of the regenerative coil, means for circulating a heating medium through the pasteurizing-coil, means for circulating a cooling medium through the cooling-coil, means for circulating the raw milk through the regenerative coil, and

means for flowing the milk from the regenerative coil onto the top of the pasteurizingcoil.

In testimony whereof I hereunto set my hand, this 26th day of September, 1906, in the presence of two attesting witnesses.

CHARLES W. REID.

Witnesses:

W. R. KENNEDY, R. M. PARKINS. 

